:root{--bg:#faf8f4;--fg:#1f1d1a;--muted:#6b665e;--card:#ffffff;--line:#e4dfd6;--accent:#8a5a2b;--accent-bg:#f3e9dc;--ok:#2e7d4f;--warn:#b7791f;--bad:#b3413a;--key-w:#fffdf8;--key-b:#2b2622;--hl:#f2b96b;--hl2:#8fd3a8;--shadow:0 1px 3px rgba(0,0,0,.08)}
@media (prefers-color-scheme:dark){:root{--bg:#161412;--fg:#ece7df;--muted:#a49c90;--card:#221f1b;--line:#3a352f;--accent:#e0a866;--accent-bg:#2e2620;--key-w:#e9e4da;--key-b:#0d0b0a;--hl:#d9973f;--hl2:#4fa872;--shadow:none}}
*{box-sizing:border-box}
html{font-size:19px;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font-family:-apple-system,"PingFang TC","Noto Sans TC","Helvetica Neue",sans-serif;line-height:1.65}
a{color:var(--accent)}
.top{position:sticky;top:0;z-index:5;display:flex;align-items:center;gap:.8rem;padding:.6rem 1rem;background:var(--card);border-bottom:1px solid var(--line)}
.top .brand{font-weight:700;text-decoration:none;color:var(--fg);font-size:1rem}
.top .brand small{color:var(--muted);font-weight:400;margin-left:.4rem}
.top button{margin-left:auto;font-size:1rem;padding:.4rem .8rem;border:1px solid var(--line);background:var(--bg);color:var(--fg);border-radius:.5rem;min-height:44px}
.layout{display:flex;min-height:calc(100vh - 60px)}
nav.side{width:230px;flex:none;padding:1rem .8rem;border-right:1px solid var(--line);background:var(--card)}
nav.side a{display:block;padding:.45rem .6rem;border-radius:.4rem;text-decoration:none;color:var(--fg);min-height:44px;display:flex;align-items:center}
nav.side a.cur{background:var(--accent-bg);color:var(--accent);font-weight:700}
nav.side .grp{font-size:.8rem;color:var(--muted);margin:.8rem .6rem .2rem;text-transform:uppercase;letter-spacing:.05em}
main{flex:1;max-width:760px;margin:0 auto;padding:1.4rem 1.2rem 4rem;width:100%}
@media (max-width:1023px){.layout{display:block}nav.side{display:none;width:auto;border-right:0;border-bottom:1px solid var(--line)}nav.side.open{display:block}main{max-width:720px}}
@media (min-width:1024px){.top button{display:none}}
h1{font-size:1.75rem;line-height:1.3;margin:.2rem 0 .3rem}
h2{font-size:1.3rem;margin:1.8rem 0 .6rem;padding-bottom:.25rem;border-bottom:2px solid var(--accent-bg)}
h3{font-size:1.1rem;margin:1.2rem 0 .4rem}
p{margin:.5rem 0}
ul,ol{padding-left:1.4rem}li{margin:.3rem 0}
table{border-collapse:collapse;width:100%;margin:.6rem 0;font-size:.95rem}
th,td{border:1px solid var(--line);padding:.45rem .6rem;text-align:left;vertical-align:top}
th{background:var(--accent-bg)}
.scroll{overflow-x:auto}
.lead{color:var(--muted);font-size:1.05rem;margin:0 0 .8rem}
.pill{display:inline-block;padding:.1rem .55rem;border-radius:1rem;font-size:.8rem;background:var(--accent-bg);color:var(--accent);margin-right:.3rem;vertical-align:middle}
.pill.ok{background:#e3f3e8;color:var(--ok)}.pill.warn{background:#fbf0d9;color:var(--warn)}.pill.bad{background:#f8e2e0;color:var(--bad)}
@media (prefers-color-scheme:dark){.pill.ok{background:#1f3a2a}.pill.warn{background:#3d2e14}.pill.bad{background:#3d1f1d}}
.card{background:var(--card);border:1px solid var(--line);border-radius:.8rem;padding:1rem 1.1rem;margin:.8rem 0;box-shadow:var(--shadow)}
.card.song{border-left:5px solid var(--accent)}
.card.fix{border-left:5px solid var(--bad)}
.card.fix ol{margin:.3rem 0}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:.8rem}
.wk{display:block;text-decoration:none;color:var(--fg);background:var(--card);border:1px solid var(--line);border-radius:.8rem;padding:.9rem 1rem;min-height:110px;box-shadow:var(--shadow)}
.wk .n{font-size:.85rem;color:var(--muted)}.wk .t{font-weight:700;margin:.2rem 0}.wk .m{color:var(--accent);font-size:.9rem}
.video{margin:1rem 0}
.video .frame{position:relative;width:100%;aspect-ratio:16/9;background:#000;border-radius:.6rem;overflow:hidden}
.video iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.video .meta{font-size:.92rem;color:var(--muted);margin:.4rem 0 0}
.video .meta b{color:var(--fg)}
.video details{margin-top:.3rem;font-size:.92rem}
.check li{list-style:none;position:relative;padding-left:2rem;min-height:2rem}
.check li::before{content:"";position:absolute;left:0;top:.2rem;width:1.3rem;height:1.3rem;border:2px solid var(--muted);border-radius:.3rem}
.check{padding-left:0}
.pn{display:flex;justify-content:space-between;gap:1rem;margin-top:2.5rem;padding-top:1rem;border-top:1px solid var(--line)}
.pn a{text-decoration:none;padding:.6rem .9rem;border:1px solid var(--line);border-radius:.6rem;min-height:44px;display:inline-flex;align-items:center}
.plan{display:grid;grid-template-columns:auto 1fr;gap:.3rem 1rem;align-items:baseline}
.plan b{white-space:nowrap}
svg.kb{width:100%;height:auto;display:block;margin:.6rem 0}
figcaption{font-size:.9rem;color:var(--muted)}
.note{font-size:.92rem;color:var(--muted)}
footer{font-size:.85rem;color:var(--muted);margin-top:3rem;border-top:1px solid var(--line);padding-top:.8rem}
a.seek{font-variant-numeric:tabular-nums;font-weight:700;text-decoration:none;border-bottom:2px solid var(--accent);padding:0 .1rem}
a.seek:active{background:var(--accent-bg)}
.video details[open] summary{margin-bottom:.2rem}